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1 Pack-lego Compatible X-large Dark Grey Baseplate, Building Base Plate, 50x50 Studs (15x15"), Bigger Than Lego 48x48 (10701) and Lego 32x32 (10699)" : Amazon.co.uk: Toys & Games
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Amazon.com: (European Version) LEGO Classic Base Extra Large Building Plate 15 x 15 Inch Platform, Gray | 10701 : Video Games
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Amazon.com: (European Version) LEGO Classic Base Extra Large Building Plate 15 x 15 Inch Platform, Gray | 10701 : Video Games
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